Cement-kiln.



No. 686,78l. Patented Nov. I9, rem. J. n. SWINDELL.

CEMENT KILN.

(Application filed June 11, 1900.} (No Model.) 5 Sheets-Sheet 1.

THE Noam: vmzns co.. PHOYO-LITHOY, wasumcncn, n. q

No.- 686,78l. Patented Nov. l9, l90l.

.I. u. SWINDELL.

CEMENT KILN. Applicaltiop filed June 11, 1900.)

(No Model.) 5 Sheets-Sheet 2.

TNESSES "m5 Nonms PETERS co. PHOTO-LUNG \usnmawm D c.

I INVENTOR V Attorney Patented Nov. I9, I90]. J. D. SWINDELL.

CEMENT KILR (Applicaticn filed June 11, 1900.)

5 Sheets -Sheat 3.

(No Model.)

M @11 In nHm muHu "M 4U I INVEN TOR WITNESSES,

Alloriey N0. 636,78I. Patented Nov. l9, l90l. J. D. SWINDELL.

CEMENT KILN.

(Application filed Julia 11, 1900. v v (No Model.) 5 Sheets-8heet 4.

THE "cams warms cc FHJTO-LITHOV WASHINGTON. u. c.

Patented Nov. [9, I901. J. D. SWINDELL. 1

CEMENT KILN.

(Application filed June 11, 1900.

5 Sheets8haet 5.

(NoModBL) [TNESSES INVENTOR Attorney UlTED STATES PATENT OFFICE.

JAMES D. SWINDELL, OF PITTSBURG, PENNSYLVANIA.

CEMENT-KILN.

SPECIFICATION forming part of Letters Patent No. 686,781, dated November 19, 1901. Application filed June 11, 1900; Serial No. 19,939. (No model.)

To aZl whom it may concern:

Be it known that I, JAMES D. SWINDELL, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Cement-Kilns; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvementin kilns, and more particularly to cement-kilns, the object of the invention being to provide an improved kiln which will quickly and thoroughly burn cement material into clinker.

A further object is to provide a kiln with improved valve mechanism for regulating the admission of air and gas into the same and the discharge of the burned air and gas therefrom and which will be adapted to reverse the flow of the air and gas.

A further object is to provide an improved revolving combustion-chamber with an im proved hearing.

A further object is to provide a receptacle in which the cement material is treated which will comprise chambers of different diameters.

With these objects in view the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view, partly in section, illustrating my improvements. Fig. 2 is a view in side elevation, partly in section, of the same. 3 is a View in transverse section on the line w w of Fig. 1. Fig. 4 is a view illustrating the operating mechanism of the air and gas inlet and exhaust valves. Fig. 5 is a plan viewofthesame, and Figs. 6, 7, 8, 9, 10, and 11 are detail views of the roller-bearingsupport for the combustion-chamber.

A represents a cylindrical combustionchamber provided near each end with a peripheral track 1 and between its ends with a peripheral rack 2, in mesh with a pinion 3, connected with and operated by a chain of gear at, as shown in Fig. 2. Each track 1 is mounted on roller-bearings t, which run on a frame 5, comprising a base 5, parallel up- Fig..

right sides 5", a concave runway 7 on the upper edge of the sides and having'rounded ends, and an intermediate runway 6, disposed between the runway and base 5, and strengthening-ribs 7 are secured to the sides 5 and base 5 to strengthen the frame. The runways 6 and '7 are each provided with parallel grooves in their upper faces, in which the flanged ends 9 of the rollers 49 run and between which flanges the track 1 is mounted. The rollers 4 revolve on pins 10*, con neoted by links 10 to form an endless chain, which passes over the runway 7, down on the runway 6, and over the runway? again, thus forming a continuous roller-bearing for the cylindrical combustion-chamber.

The rear or raised end of the chamber A communicates with a contracted inlet-chamber 11, supported on atrestle-work frame 12 and provided with an inlet-pipe 13 for cement material and a chimney or flue 14 to carry off a portion of the heat to dry the coment material entering theinlet-chamber. A damper (not shown) may be provided in the flue 14 to regulate the draft therethrough. The forward or lower end of the combustionchamber-A is made with a peripheral groove the furnace and at its lower discharge portion with a chute 17, through which the cement clinker is discharged and conveyed to suitable mills for pulverizing it. The chute 17 is provided with suitable openings for the insertion of tools to dislodge clinker from the lining of the combustion-chamber and chute, and said openings are closed by doors 18, as shown. The flues a band a dare arranged in pairs, one pair on each side of the furnace B, and are separated at their upper ends by a division-wall 19 to compel the air and gas entering through one pair of flues to pass into the combustion-chamber before making their escape through the fines on the opposite side of the furnace, as will be more fully hereinafter explained. The flues a, b, c, and d communicate at their lower ends with regenerating-chambers e, f, g, and h, respectively, each having a passage 21 for the inlet of air or gas or the discharge of the same after being burned. A chamber 0 is disposed above upper portion with the flues a, b, c, and d of ICO all of the passages 21 and communicates with them by means of openings closed by valves 1', j, 70, and Z, respectively, and said chamber is provided with a chimney or flue D for the escape of the burned air and gas. A gas-inlet pipe E, connected with any approved gas-supply by a pipe F, communicates with the passages 21 of the chambersfand g, and valves m and 11, respectively, are adapted to open and close communication between said pipe E and the chambersfand g. The

passages 21 for chambers e and h are pro-.

vided with air-inlet valves 0 and p, respectively, for the admission of air to the regenerating-chambers e and h. The construction of and operating mechanism for the valves 2', 7', k, Z, m, n, 0, and p are precisely alike, and hence the following detailed description of one will apply alike to all. The valve itself is made saucer-shaped and provided centrally with an upwardly-projecting lug 23, to which is secured an upright rod 24:, passing, through an opening in a plate or cover 25, secured over the manhole 26 in the chamber 0 or gas-flue E. A rope or cable 27 is secured to the upper end of the rod 24 and is passed over a pulley 28. above the rod, and from thence to and secured to the lower end of a lever 29, fulcrumed between its ends and provided with a segment 30, Figs. 3 and 4, to lock the lever in any position to which it may be moved. Another rope or cable 31 is secured to the rope or cable 27 and is passed over a pulley 32 and has a counterweight 33 secured at its free end to counterbalance the weight of the valve. As the air-valves 0 and 19 do not communicate with any chamber above them, it is not necessary to employ the rod 24, which is therefore dispensed with and the rope or cable 27 secured directly to the lug 23 on the valve. It will thus be seen that each valve operates independently of the others, and therefore the passage of the currents of air and gas through the valved openings can be regulated for governing the combustion in the chamber A.

The operation of my improvements is as follows: All the valves being closed, air-valve p and gas-valve n are opened, and also escape-valves i and j. Air enters chamber-71, and passes up flue (1 into the chamber A. Gas enters chamber 9 and passes up through flue c and into the chamber A, where combustion takes place, and the greater portion of the burned air and gaspasses down through the tines a and I), through the chambers e and f to heat the same, and out through the openings closed by valves i and j to chamber 0, and thence out through the chimney or stack D. A small portion of the heat passes through the chamberA and out through stack or fiue 14 to dry the cement material entering through pipe 13, which latter deposits the material in the inlet-chamber 11, and the material is fed forward therein and dropped into the revolving chamber A, and as the material is fed to the forward or lower end thereof it will be scattered in small particles on the inner surface of the chamber, and as it nears the extreme forward .end of the chamber it will be burned to clinker by the intense heat and drop through the chute 17 into suitable conveyers below and carried to mills for pulverizing the same. When the regeneratingchambers e andfare heated to the proper degree by the burned air and gas passing therethrough, the gas-valve nis closed long enough to permit all gas in the furnace to be consumed, when the air-valve p and exhaustvalves 1' andj are closed and gas-inlet valve m, air-inlet valve 0, and exhaustvalves 71; and Z opened, and thereby reverse the operation of the furnace. It will thus be seen that by employing my improved valve mech anism there is no waste of unburned gas, as is the case with all furnaces of similar character heretofore known, and that by constructing the combustion-chamber as above described a shorter cylinder than heretofore in use and one of larger diameter can be employed, as by having a contracted inlet-chamber emptying into the large chamber to seatter the material the material will be more effectually treated in ashorter space of time than could be accomplished with any apparatus heretofore known. Y

The combustion-chamberA and in fact all other parts of the kiln exposed to great heat can be and are lined with fire-clay, as shown.

Various slight changes might be resorted to in the general form and arrangement of the several parts described without departing fromithe spirit and scope of my invention, and hence I would have it understood that I do not wish to limit myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a kiln, the combination with a combustion-chamber, of a series of regeneratingehambers and lines connecting them with the combustion-chamber, and independently-op erated valves for controlling the passage of air and gas through a portion of the regener= atingchambers to the combustion-chamber and for controlling the passage of products of combustion from the combustiomchamber through the remaining regenerating-chambers, whereby certain valves can be closed to stop the flow of gas some minutes before ireversing from one to the other set of regener ating-chambers is effected so that remaining gas in the first regenerating-chambers will be burned instead of escaping directly to the stack.

2. In a kiln, the combination with a com bastion-chamber, a series of four regenerat ing-chambers and flues connecting all of said regenerating chambers with one end of the combustion-chamber, of inlet and exhaust valves for controlling the passage of air and gas to the combustion-chamber through two of said regenerating-chambers and for controlling the passage of products of combustion from said combustion-chamber through the other two regenerating-chambers, and separate operating mechanism for each valve.

3. In a kiln, the combination with a combustion -chamber, a series of regenerating chambers on each side of said combustionchamber and lines connecting each of said regenerating chambers with one end of the combustion-chamber, of means for directing a current of air and gas through one series of regenerating-chambers into one end of the combustion-chamber and out from the same end of the combustion-chamber through the other series of regenerating-chambers, an inlet and an outlet valve for each regeneratingchamber for controlling the feed of fuel to and the discharge of products of combustion from the combustion-chamber and separate operating mechanism for each valve.

4. In a kiln, the combination of a combustion-chamber, two sets of regenerating-chambers communicating with the outlet end of said combustion-chamber, a stack adapted to communicate with said chambers, a smaller stack communicating with the inlet end of the combustion-chamber, a series of valves for controlling the passage of fuel through one set of regenerating-chambers and the outlet end of the combustion-chamber and for controlling the exhaust of products of combustion from the combustion chamber and through the other set of regeneratingchambers, and means for independently operating said valves.

5. In a kiln, the combination with a revo-' luble combustion-chamber having a peripheral track, of a frame disposed under the combustion-chamber and having a trackway on its top made concave concentric with the combustion chamber, said frame having curved ends and having grooves at each side of the trackway, and an endless series of connected rollers mounted to travel between the trackway on the frame and the trackway on the combustion-chamber, each roller having annular flanges at each end to enter the grooves at respective sides of the trackway thereon and to embrace the trackway on the combustion-chamber.

6. In a kiln, the combination of a revoluble combustion-chamber having a trackway thereon, a hollow frame disposed under the same and having an upper concave trackway and a trackway under said concave trackway, and an endless series of connected rollers adapted to pass between the trackway on the combustion-chamber and the concave track- Way on the frame and also adapted to travel over the trackway in the frame under the concave trackway.

In testimony whereof I have signed this specification in the presence of the subscribing witnesses.

JAMES 1). SWINDELL. Witnesses:

F. O. HENZI,

HARRY E. M. LINE, E. C. SWINDELL. 

